JM--
LHO may have considered himself a patsy, in the sense he was "hung out to dry," or left "holding the bag."
That is, LHO participated in the JFKA, and was promised a getaway ride, and then perhaps a trip to Cuba or offshore. Perhaps a lump sum of money too.
Instead, there was no post-JFKA ride, and LHO's erstwhile confederates had vamoosed.
If LHO had been working for Bruce Solie (as theorized by some)...one can see why US authorities would have conducted a very ginger investigation into LHO's confederates.